FELIPE MARCELINO Software Engineer · full-stack · applied AI Americana, SP · Brazil · felipe99marcelino@hotmail.com https://www.linkedin.com/in/felipe-marcelino · https://github.com/felipemarcelino99 SUMMARY ------------------------------------------------------------------------ Full-stack Software Engineer with 4+ years of experience, focused on product, customers and results. I build web applications, e-commerce and internal systems with React, Next.js, TypeScript, Node.js, NestJS, Fastify and relational databases, from the interface to architecture, integrations, performance, automation and security. I use AI agents in the engineering workflow, with rules, review and tests. IMPACT ------------------------------------------------------------------------ - 11s → <1s: critical e-commerce query optimized (90%+ faster) - ~5 months: from prototype to production of a billing portal - 130+: ADRs and business rules documented - ~70: accessible components in a design system with light and dark themes - 1,500+: employees supported in HR, before tech EXPERIENCE ------------------------------------------------------------------------ Software Engineer (full-stack) — Better EdTech (Apr 2026 – present) Billing, financial reconciliation and critical integrations, focused on automation, traceability, governance and reliability. - Billing portal from prototype to production in about 5 months: orders, charges, NF-e/NFS-e invoice issuing and access release. - Automated reconciliation of installments and amounts released by card acquirers, with preview, divergence queue, audit trail and orphan-invoice linking. - Integrations with Vindi, Omie, Pagar.me, Yapay and Cielo, with webhook logs, Outbox and idempotency. - Governance: 130+ ADRs and business rules; quality gates on commits and CI, mutation testing, E2E and weekly dependency audits. - AI agents in the development workflow, with plans, adversarial review and execution evidence. - Shared design system with tokens and about 70 accessible components, with light and dark themes. Stack: React, Next.js, Fastify, PostgreSQL, TypeScript Full-stack Developer — Rozac (Jun 2025 – Apr 2026) Main platform: new features, architecture evolution, integrations and developer experience. - Conceived and built Rozac Studio: AI image generation for fabric mockups applied to products and per-seller promotional banners. - Introduced Skills and MCPs on the front-end for AI-assisted programming, productivity and E2E tests. - SQL query management UI with React Query and AG Grid, with safe execution and editing. - Python tool integrated with NestJS over SSE to schedule maintenance mode without developers or a new build. - Led commit standardization and introduced E2E tests with Cypress. Stack: React, Next.js, TypeScript, Tailwind CSS, NestJS, Prisma, Redis, Nginx, Python, Cypress Full-stack Developer — Inversa Desenvolvimento Digital (Sep 2022 – Apr 2025) E-commerce, landing pages, institutional websites and mobile apps, front-end and back-end, focused on UX, performance and stability. - Cut a critical e-commerce query from 11 seconds to under 1 second (90%+ reduction). - Fixed a fraud vulnerability in multi-currency operations caused by cookie manipulation. - Recurring purchases system, with database modeling, cron jobs and business rules. - Maintained legacy systems and fixed high-impact production issues. - Mentored an intern (onboarding and code reviews) until they were hired. Stack: PHP, MySQL, JavaScript, TypeScript, React, Next.js, React Native Front-end Development Intern — Inversa Desenvolvimento Digital (Mar 2022 – Sep 2022) Responsive interfaces from Adobe XD and Figma prototypes. - Landing pages, institutional websites and email marketing campaigns. - SEO, accessibility and performance improvements. Stack: HTML, CSS, JavaScript, jQuery, PHP, MySQL HR Apprentice and Assistant — DIA Brasil (Jul 2018 – Sep 2020) Before tech: personnel administration and nationwide employee support. - Supported 1,500+ employees and benefits delivery. - Employee documentation, social security leave processes and biometric registration. PROJECTS ------------------------------------------------------------------------ Montali Hub — SaaS · own product (live) SaaS for party rental businesses: store website, calendar, contracts and customers in one place, with an AI assistant. Stack: Next.js, React, TypeScript, Supabase, PostgreSQL, MCP aidd-framework — open source framework · CLI (published on npm) Framework for building with AI agents without losing quality: rules, skills and automatic git guardrails, installed with one command. Stack: Node.js, JavaScript, Git hooks, Claude Code, npm SR Energy — web system for a client (live) Management system for a technical energy services company: commercial proposal, work order, technician schedule and PDF report, in one flow. Stack: React, TypeScript, Fastify, PostgreSQL, Redis, Docker GAN — courses & stores platform (live) Platform with an online course and subscription stores: student area, integrated payments, admin dashboard and consent-based analytics. Stack: Next.js, TypeScript, PostgreSQL, Cloudflare, VPS Viviane Marcê — website for a client (live) Website for a wedding decorator in the Campinas region: a scroll-driven animated opening, a portfolio of ceremonies and SEO to be found on Google and by AI assistants. Stack: Next.js, TypeScript, Tailwind, Cloudflare SKILLS ------------------------------------------------------------------------ - Front-end: React, Next.js, React Native, TypeScript, Tailwind CSS, Zod - Client state & data: React Query, Context API, Zustand - Back-end: Node.js, NestJS, Fastify, Prisma, Nginx, Redis - Databases: PostgreSQL, MySQL - Quality: Cypress, E2E, mutation testing, quality gates - AI: Claude, Codex, MCP, Skills, Spec-Driven Development, agentes de IA / AI agents - Tools: Git, GitHub, Bitbucket EDUCATION ------------------------------------------------------------------------ - Postgraduate in AI Process Automation Engineering — Data Science Academy (DSA) (2026–2027, in progress) - Bachelor's in Information Technology — UNIVESP — Universidade Virtual do Estado de São Paulo (2022–2025) - Business Administration technician — ETEC Polivalente de Americana (2017–2018) - IT technician — ETEC Polivalente de Americana (2015–2016) LANGUAGES ------------------------------------------------------------------------ - Portuguese: native - English: intermediate Updated 2026-10-31. 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